Filtering-machine.



J. DRAGEL. .IILTBRING MACHINE. I APPLICATION FILHD JANJ, 1911. RENEWED IAN. 10,1914.

, 1,087,647., Patented Feb. 17,1914.

8 SHEETS-SHEET l.

J. DRAGE. FILTERING MACHINE, APPLIGATION FILED JAN. 6, 1911. RENEWED JAN. 10, 1914.

Patented Feb. 17, 1914.

a SHEETS-SHEET 2.

J. DRAGE.

FILTERING MACHINE v LPPLIGJIYFION FILED 11111.6, 1911. RENEWED JAN. 19. 1914.

Patented Feb. 17, 1914-.

a SHEETS-$111121 a.

JAMES DRAGE, orBoULnERjwEs'rERN AUSTRALIA, AUSTRALIA.

FILTERING-MACI-IINE.

Specification of Letters Patent.

Application filedJannary 6, 1911, Serial No. 601,144. Renewed January 10, 1914. Serial No. 8 1-1 496.

To all whom z'zf mag concern 3;

Be it known that I, JAMES DRAGE, a subject of the King of at Boulder, in the vented new and us ful Improvements in Filtering-Machines, of which the following is a specification.

This invention has been devised for the purpose of providing an improved filtering machine for the treatment of pulp, by extracting, firstly the metal solution, secondly a weak solution wash and thirdly, water'wash. The Whole providing a treatment machine capable of treating a large quantity of material in a cheap and eflicient manner.

In order that my invention may be clearly understood both as to its construction and the method of operation, I shall describe the same by the aid of the acco panying illustrations in which Figure'l. is a longitudinal section of a complete series of my machines. Fig. 2. is a section through line a. 6. showing the perforated partition. Fig. 3. is an end elevation from the driving end. Fig. 4. is a front elevation of half of the wheel on a larger scale. Fig. is a vertical section of the wheel and valve boss. Fig. 6. is a face View of the valve cap. Fig. 7. is a section of the valve boss and cap. Fig. 8. is a face view of the valve boss. Fig. 9 is a detail ofthe outer carrying pipe for filter frames. Fig. 10. is a detail of the inner carrying pipe for-filter frames. Fig. 11. is an enlarged view of a filter frame.

Similar'characters are used throughout the drawings to represent corresponding wherever they occur;

For the purpose of my invention I construct a wheel boss 1, to which a filter wheel is attached by means of a body plate 3, the same being attached by means of the flange clamp 5. =This boss is provided with a stay flange 29, and a circle of port holes having axial portion 8 and radial port-ions 8, for the vacuum connections and a circleof port of compressed air parts at an angle to the port holes 8. This boss is carried in a bearing 4, and revolves with the filter wheel.

I fit a valve cap 6, to the end of this boss,

the faces of both being fit- Great Britain, residingf State of Western Aus-. tralia, Commonwealth of Australia, have ma clean the. flanges 41. These filter frame These sight glasses glands 30, and 31, to make them air tight,

and a connecting pipe 12, for the vacuum and a chamber 13, having an are shaped outlet or port'lO, in the face of the valve cap There are also port holes 11 and 11", which are used for the admission of air, steam orlubricant. are the same distance from the'axis of rotation ofthe filter frames and therefore register with the circleof holes 9 in the boss 1, and are used for air pressure to remove Patented Feb. 17, 1914.

The ports 11 and 1.1

the cakeor for steam or water pressure to locate leaks in the filter frames. As the wheel revolves, the ports 9 successively register with ports 11 and then with port 11. Port 11 is in connection with a source of air under pressure so that when ports 9 are in registry with port 11 compressed air passes into the corresponding filtering-dc vice which is in a discharging position causing distention of the filtering cloth and thus shaking off the adhering cakes. register with port 11, and a volume of steam or water under pressure is allowed to pass into .the filtering element which has the purpose of cleaning the filtering cloth and as- Ports 9 then suring its successful action when again imin mersed into the solution. This cap 6, is held to the bearin 4, by means of 7, having bu er springs 32, which keep the faces of the cap 6, and boss 1, in working contact. I place couplings 45,

of which the valve cap 6, may be removed or repaired.

For the support of the ably use a plate diskas 3, the filter frame pipes 18, which are attached to the disk 3, by means of flanges 40, and bolts, and are-supported at their other ends by means of rings 15, and 16, attached to pipes. 18, the filter machine I preferhave connections 42, to attach frames 17, at their four corners.

At the back of the disk 3, and c01 nmuni-' eating with the filter frame pipes 18, are attension boltson theshaft 2, that permits a space in the shaft by means to which are fitted W1- tached the connecting pipes 14, which radiate from the vacuum ports 8', in the boss 4, and in these connecting pipes 14, "I place sight glasses 33, by means of which the state of the solution passing may be observed? consist of a box having transparent faces on two sides. I strengthen" the wheel with stay rods 34, connected from the periphery of the disk 3, to the stay flange 29, on the boss 1. v

The filter frames 17,. consist of perforated pip'es as shown in Fig. 11, the space being filled with a fluted board 43, and the whole covered with canvas 46 or the like, as a filtering medium and having connecting couplings or unions at two of their corners so that the vacuum or pressure is comniunicated to them through the vacuum pipes 14C, and 18. These filter frames 17 are made in the form of portion of a circle, and are placed parallel to the disk plate and in series of parallel circles.

For the purpose of delivering the pulp from the machine I may use a chute inclined from the inner surface of the disk plate 3, to the center outside of the filter frames but I preferablymse a belt 19, of some suitable material carried on'terminal rollers 20, and supporting'idlers or rollers 21, so constructed and set in the machine that the weight of the pulp adhering to the belt 19, will cause it to move downward around the rollers20, and'deposit the pulp into the adjoining compartment of the machine. I fit an apron 35, above this "conveyer 19, which is attached to the frame of the conveyer, and rests close to the disk 3, to insure the pulp falling on the conveyer 19.

The filtering wheels are arranged in series as shown in Fig. 1, and are set in tanks 22, divided into compartments alternately agitating and filtering compartments. In the agitating compartments 1 fit agitating blades as 25, operated from the driving shaft 26, by means of the miter gear 27, and baille plates 44, to prevent the overfiow of the agitated pulp.

The partitions between the agitating and filtering tanks are either perforated as 23,

- shown in Fig". 2, or are fitted with screens or perforated metal and the next partition, as '24, is solid and so arranged that the agitating blades 5, force the ulp downward through the lower rows of holes into the adjoining filtering compartment then upward around the filtering frames 17, and back into the agitating tank, through the upper row of holes. The agitator in the last compartment simply keeps the pulp fluid while it overdows through the chute 36,- and is conveyed per launder .or pipe to the; residue dump or the like. (If required to remove the residue in a partially dry state such as by truck or belt conveyer this last compartment is unnecessary.)

Motion is communicated to the machine from any convenient source of power by the pulleys 37, which operate the driving shaft 26, and agitatorgears 27 gear 39, and step pulleys, 38, communicate the motion to the main shaft 2 through the gear 28. The suction of a wet vacuum pump is connected'by means of-pipes of hose to the vacuum chamhers 13, in the boss 4:, by the connecting pipe 12. Air or steam or both, are connected to the valve cap 6, by the inlets 11.

' The method of operation of my invention is as follows :The tanks 22, are filled with i "stood that the wheel boss l, revolves with the wheel while the valve cap 6, remains sta-- tionary and. is so adjusted that the arc shaped port 10, in the valve cap establishes communication between the vacuum chamber 13, and all the ports'8, in the boss that are temporarily opposite to it, thus placing all the filter frames 17, that are immersed in the pulp and those requiring to be denuded ofmoisture after passing through the pulp and collecting a cake, under the action of the vacuum. When these ports 8, in the boss 4, reach the end bf the arc shaped port 13, the vacuum is cut off and the air holes 9, in the boss arrive opposite the air hole 11. When compressed air or live steamis admitted and passes up into the filter frame, the cake of pulp from the filtering surfaces is removed. This is arranged to take place when the filtering frame is at or near its highest point and above the chute'orconveyer 19, and the liberated cake drops on to the chute croonveyer 19, and is passed into the second compartment where sufficient water or weak solution is added to replace that removed in the former operation, and the operations repeated on the second wheel, and so on through as many wheels as are necessary to remove the values from the pulp.

Pulp is continuously added to the first compartment of the tank 22, to replenish the amount treated, the process thus being continuous, and added to each compartment to replace the solution extracted by the vacuum pump.

1 am aware that themethod of filtering pulp by means of vacuum is in eneral use and I do not claimthis' particu ar feature as a part of myin'vention. i

What I do claim as my invention and desire to secure by, Letters Paten't is 1. A filtering apparatus comprising in combination, a filtering tank and an agitating tank and lower and upper means effecting communication with said tanks, a filter-V ing device in said filtering tank, and agitating means for causing circulation from sai vagitator to said filtering tank throu 11 said lower fneans and back through sai upper weak solution or water is means, substantially as and for the purposes set forth.

g tank, a filtering Wheel in each filtering tank,

combination, .1 series of ta k structures each as described. Y comprising an agitator and a filtering tank, In testimony whereof Iafiix my signature fcommunicating means, and return commuin presence of two Witnesses.

5 nicating means between the agitator and the I AM DRAGE 2. A filtering apparatus comprising in cessively throughout the series, substantially 10 and means for discharging the cake from 1 VVitnt-sses:v the filtering Wheel of one tank structure to WILLIAM GEORGE MANNERS, the agitating tankof the next-structur 'isuo v R. J. BRIMBLEGOMBE. 

